Device for holding and operating the jaws or ends of the reins of a temper-screw



(No Model.) 2 SheetsSl1eet 1. 0. J. BALDWIN. DEVICE FOR HOLDING ANDOPERATING THE JAWS 0R ENDS OF THE REINS OF A TEMPER SCREW.

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(No Model.) 2 SheetsSheet 2.

O. J. BALDWIN.

DEVICE FOR HOLDING AND OPERATING THE JAWS 0R ENDS 'OF THE REINS OF ATEMPEE SCREW.

No. 476,721. Patented June '7, 1892.

NITED STATES OZRO J. BALD'WIN, OF YOUNGSVILLE, ASSIGNOR OF ONE-HALF TO\VILLIAM A. LOUDEN AND GEORGE \V. LOUDEN, OF ALLEGHENY,- PENNSYLVANIA.

DEVICE FOR HOLDING AND OPERATING THE JAWS R E NDS OF THE REiNS OF ATEMPER-SCREW.

SPECIFICATION forming part Of Letters Patent No. 476,721, dated June 7,1892. Application filed March 12, 1892. Serial No, 424,864. (No model.)

To aZZ whom, it may concern: top of the lever A it will be readily seenthat Be itknown that I, OZRO J. BALDWIN,acltithe weight of said ballwill always cause the zen of the United States, residing atYoungsratchet to become rigidly engaged at each step ville, in thecounty of Warren and State of in the process of operation, therebyprevent- 5 Pennsylvania, have invented certain new and ing the same fromslipping. The purpose of useful Improvementsin a Device for Holding thecam or eccentric a is to regulate the deand Operating the Jaws or theEnds of the gree of pressure upon the end of the jaws of Reins of aTemper-Screw; andI do hereby (16- the temper-screw, whereby the same arerigclare the following to be a full, clear, and exidly held in theirnormal position. It will 10 act description of the invention, such aswill readily be observed in Fig. 2 that'there is 10- enable othersskilled in the art to which it apcated in the orifice a in said leverapadding,

pertains to make and use the same. or, more properly speaking, a pieceof elastic My invention relates to a device or mechblock E, the functionof which is to impart anism for operating and holding in theirnorelasticity to the lever when in operation.

15 mal position the lower end or jaws of the reins 0 represents thecollar or yoke of my deof a temper-screw, which is now universally vice,which fits around the end or jaws of the used in drilling or boring oilor gas wells; and reins G of the temper-screw F. This collar is itsobject is to provide a device which is very constructed so as to beadapted to fit over the simplcin construction, effective, andpracticalend of said reins and is provided with two 20 in operation, therebyenabling the operator to jaws c, which are circular in construction andperform almost instantaneously what under have the notches 0 upon theouter edges of the presentmeansnow employed for such purthe same. Ineach of said jaws there is an poses would require at least four times asorifice c,in which is locatedthe journal-boltB. long. I attain thisobject by a certain con- These notches engage the end of the pawl D. 25struction, combination, and arrangement of The pawl D is provided uponits under side parts fully described in this specification, and with aslot (1, which is adapted to fit over the illustrated in theaccompanying drawings, in lug 0. which has an orifice a upon the top ofwhich the lever A. In the sides of this pawl (the Figure l is a sideview of my invention atlower edges of which are circular) adjacent 3otached to the temper-screw and in a position the slot (Z there are twoholes cl, through which for use. Fig. 2 is a side view, partly in secisplaced the pivot or screw bolt (Z which fastion, of the lever which islocated in the jaws tens said pawl to the lever A. One end (Z of of thecollar or yoke of my device. Fig. 3 is this pawl is made to engage thenotches c a detailed perspective view of said yoke or upon the jaws ofthe collar 0. Upon the lower 3 5 collar. Fig. 4 is a bottom view of thepawl or side of the other end of this pawl there is proratchet. vided aspring (i which extends forward and Referring to the drawings, theletter A desdown and rests upon the back of the lever A. ignates thelever employed in the operation This spring holds said pawl in itsnormal poof my invention, which is constructed with a sition. 40 solidround ball aupon one end and an eccen- The operation of my invention isas follows: tric or cam a upon the other. This lever has When thetemperscrew is run out and the bearings c in the jaws c of the yoke orcollar driller wishes to elevate the same to the top O and is mountedupon a journal-bolt B, of the reins of the temper-screw before runwhichis located in the orifice a in the throat ning another bit, he willsimply take hold of 5 5 of the aforesaid cam or eccentric. Said jourtheball upon the end of the lever A and push k nal-bolt has bearings c inthe jaws c of the said ball or lever to the point indicated by yoke O.The ball a performs a twofold funcdotted lines in Fig. 1. When this isdone, the tion: first, it answers the purpose of a desirend or jaws ofthe tempenscrew will open able grip for the hand in operating myinvensufficiently far to enable him to raise the I00 50 tion; second, itacts as a weight, and as the temper-screw to the desired point, orrather ratchet D is pivoted upon the lug 0, upon the to the top of thereins, This being done, he

again takes hold of said ball and pulls the same down, as illustrated inFig. 1, which closes the end or jaws of the temperscrew tightly aroundthe screw when the ratchet or pawl engages the notches in the end of thecollar, thereby rigidly and securely holding the same in their normalposition, and the driller is again ready for operation.

As it is apparent that my invention is capable of various modifications,I do not wish to limit myself to any specific construction, and as Ihave thoroughly tested the same and know by experience that myinventionis very useful and practical in operation I deem it useless to furtherenlarge upon its merits.

It is well that I should mention the fact that the mode now commonlyused for operating and holding the temperscrew consists simply of a handor thumb screw which is very ineffective and tedious in operation.

What I claim is 1. In a device for operating and holding the jaws or theends of the reins of a temperscrew, the combination of a leverhavingupon one end a solid ball and upon the other end a cam or eccentric,said lever being mounted upon a journal-bolt having bearing 0 in thejaws of a yoke, the yoke fitting around the end or jaws of the reins ofthe temper-screw and provided with two jaws having the notches 0 inwhich is located the aforesaid lever, the journal-bolt upon which saidlever is mounted, and the pawl or ratchet located and mounted upon thelug a of said lever, all substantially as described, and for the purlpose set forth.

2. The combination of the leverA with the ends of the reins of atemper-screw, said lever being mounted upon a journal-bolt havingbearings c in the ends of a yoke C, the yoke 0, located upon the end orthe jaws of the reins of the temper-screw and provided with OZRO J.BALDWIN. Witnesses:

G. W. BALLOCH, EUGENE K. STEWART, Jr.

